Zen Mod

sto bi jedan reko - tvoji tenoji su stariji od Wolandovih!

sto bi jedan reko - sad imas tenoja ko Woland!

sto bi jedan reko - sad imas tenoja ko Woland!

ne zalazim kakav je zvuk Lampizator DAC-ova, ali njih dvojica nemaju mesto u istoj recenici, uzevsi u obzir tehniku, tehnologiju i biznis model

ne zalazim kakav je zvuk Lampizator DAC-ova, ali njih dvojica nemaju mesto u istoj recenici, uzevsi u obzir tehniku, tehnologiju i biznis model

Doc, ne znam sta je paja hteo da kaze,  zato sam i izbacio "paja" iz quoted
mozda po odnosu na bliske musterije jesu slicni (Kuzma je po tome vec legenda) , ali bihrekao da tu svaka slicnost zavrsava
da se podsetimo - ja sam prvi ovojud govorio da je Lukas car jer se usudio da se pomeri pogledom od opsteprihvacenog, da je car da izbunari sto niko nije ...... ali Kuzma je primer po svemu ......bio i ostao
 

Doc, ne znam sta je paja hteo da kaze,  zato sam i izbacio "paja" iz quoted
mozda po odnosu na bliske musterije jesu slicni (Kuzma je po tome vec legenda) , ali bihrekao da tu svaka slicnost zavrsava
da se podsetimo - ja sam prvi ovojud govorio da je Lukas car jer se usudio da se pomeri pogledom od opsteprihvacenog, da je car da izbunari sto niko nije ...... ali Kuzma je primer po svemu ......bio i ostao
 

ne zalazim kakav je zvuk Lampizator DAC-ova, ali njih dvojica nemaju mesto u istoj recenici, uzevsi u obzir tehniku, tehnologiju i biznis model

ne zalazim kakav je zvuk Lampizator DAC-ova, ali njih dvojica nemaju mesto u istoj recenici, uzevsi u obzir tehniku, tehnologiju i biznis model

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Lenj da prekucavam, kao i obicno, pa ce samo copy-paste sa Big DiyA
 
 or - Look Ma, with no hands,Beast with thousand iterations!!
Logic demands that main schm is here, and all future edits, if and when needed
Few facts, for start, so when you ask, I can point you to this post:
Rails - regular FW Format - in my case that is 300VA Donut per channel, 18+18Vac secondaries, two Graetz bridges per Donut
Iq - 1A7 to 1A8
Autoformer - Cinemag CMOQ-4HPC
OS - generic ( means don't care which Factory) IRFP9140 and THF51S
Keratherm 86/82 pad for Mosfet, no-name silicon sheet for THF
so, schm (as you can see, it is in fact simplified LuDEF ....... which is logical - this exactly lead me to LuDEF and few other Bstrd amps; stay tuned  )

ma jok, sva su ista
ja samo menjam naslove

ma jok, sva su ista
ja samo menjam naslove

.......... 

Lenj da prekucavam, kao i obicno, pa ce samo copy-paste sa Big DiyA
 
 or - Look Ma, with no hands,Beast with thousand iterations!!
Logic demands that main schm is here, and all future edits, if and when needed
Few facts, for start, so when you ask, I can point you to this post:
Rails - regular FW Format - in my case that is 300VA Donut per channel, 18+18Vac secondaries, two Graetz bridges per Donut
Iq - 1A7 to 1A8
Autoformer - Cinemag CMOQ-4HPC
OS - generic ( means don't care which Factory) IRFP9140 and THF51S
Keratherm 86/82 pad for Mosfet, no-name silicon sheet for THF
so, schm (as you can see, it is in fact simplified LuDEF ....... which is logical - this exactly lead me to LuDEF and few other Bstrd amps; stay tuned  )

ma jok, sva su ista
ja samo menjam naslove

ma jok, sva su ista
ja samo menjam naslove

Lenj da prekucavam, kao i obicno, pa ce samo copy-paste sa Big DiyA
 
 or - Look Ma, with no hands,Beast with thousand iterations!!
Logic demands that main schm is here, and all future edits, if and when needed
Few facts, for start, so when you ask, I can point you to this post:
Rails - regular FW Format - in my case that is 300VA Donut per channel, 18+18Vac secondaries, two Graetz bridges per Donut
Iq - 1A7 to 1A8
Autoformer - Cinemag CMOQ-4HPC
OS - generic ( means don't care which Factory) IRFP9140 and THF51S
Keratherm 86/82 pad for Mosfet, no-name silicon sheet for THF
so, schm (as you can see, it is in fact simplified LuDEF ....... which is logical - this exactly lead me to LuDEF and few other Bstrd amps; stay tuned  )

Level shifter resistor fine tune
schm, post #1 , resistor name is R115 and there is note beside

in later sketches - level shifting resistor, explained

goal is to have so so symetricall gate voltages of IRFP down and IRF up ....... (so DC offset behavior in Temp/time/mains voltage variations domains is predictable and minimally changing)

let's say that they are 4V nominally

logic is that source of IRF is approx at level of amp output

let's say that you know which Ugs is of SIT you're using ( even if you don't , easy to make adjustment later) ....... and let's say it is nice round figure of -3V

value of R115 needs to be adjusted in a way that we have voltage sag across exactly in value of SIT Ugs

and that's easy to compute - programmed current of Q103+T101 CCS is in range of 30mA, so for 3V voltage sag calculus is easy R=3V/30mA= 100R

in my case I did use 120R for both channels

in case that you're using unknown Ugs SIT - all you need after ballpark setting of Iq and DC Offset is to measure Ugs of M101 and M102, and fix** R115 to get them approx. same in absolute number

easypeasy

**it's cunning to solder there 1pin holders first then push preliminary/temporary resistor in; when final resistor is determined, just solder it in 1pin holders, for better sleep

would pack these 1pinners in kits, ZM Genius

.......... 

Level shifter resistor fine tune
schm, post #1 , resistor name is R115 and there is note beside

in later sketches - level shifting resistor, explained

goal is to have so so symetricall gate voltages of IRFP down and IRF up ....... (so DC offset behavior in Temp/time/mains voltage variations domains is predictable and minimally changing)

let's say that they are 4V nominally

logic is that source of IRF is approx at level of amp output

let's say that you know which Ugs is of SIT you're using ( even if you don't , easy to make adjustment later) ....... and let's say it is nice round figure of -3V

value of R115 needs to be adjusted in a way that we have voltage sag across exactly in value of SIT Ugs

and that's easy to compute - programmed current of Q103+T101 CCS is in range of 30mA, so for 3V voltage sag calculus is easy R=3V/30mA= 100R

in my case I did use 120R for both channels

in case that you're using unknown Ugs SIT - all you need after ballpark setting of Iq and DC Offset is to measure Ugs of M101 and M102, and fix** R115 to get them approx. same in absolute number

easypeasy

**it's cunning to solder there 1pin holders first then push preliminary/temporary resistor in; when final resistor is determined, just solder it in 1pin holders, for better sleep

would pack these 1pinners in kits, ZM Genius

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